… EST client certificate SHOULD conform to [RFC7925] …
That holds also for the server certificate, I think? If the server’s cert is not lightweight, then just optimizing the client’s cert helps only for 50%. RFC 7925 defines the profile for both client and server.
Based on @EskoDijk 's review in https://mailarchive.ietf.org/arch/msg/ace/I70MHcCzSfPIy28lDqxEOcllgJw/:
3.2 Certificate-based Authentication
That holds also for the server certificate, I think? If the server’s cert is not lightweight, then just optimizing the client’s cert helps only for 50%. RFC 7925 defines the profile for both client and server.